The fly is the front opening at the top of jeans where you'll find either buttons or a zipper. On jeans, the top button is also uncovered.
10 Fun Facts You Need To Know About Denim - Long John
Steady Eddie II – Nudie Jeans®
The History Behind Button Your Fly
Jeans Sew-Along: The Fly – Thread Theory
My kind of fly. - BeSpoke Jeans Blog
Your Fly Is Showing: Here's Why the Exposed Zipper Rules
Raw Denim FAQs: Fading and Washing - Denimhunters
The Innovative Features That Define the Modern Jean, by Thomas Stege Bojer
Denimhunters - My fades 634S next to a brand new pair
Blue Blooded: 'Denim Hunters and Jeans Culture' - Proper Magazine
Tenue De Nîmes x Japan Blue. Jeans To Help Heal Côte d'Ivoire - Rope Dye Crafted Goods
/wp-content/uploads/2014/09/Hepvill
